In 1867 when he replaced the Secretary of War, Edwin Stanton, a man appointed by Lincoln who supported the Radical Republicans, a breakaway group of the party who believed in the civil rights of freed African Americans, Congress pushed hard and presented eleven articles of impeachment alleging that President Johnson had violated what is known as the 'Tenure of Office Act', that is, a law meant to limit presidential power to remove federal appointees from office without consulting the Senate.
N' 1867 mgbe o dochiri ode akwụkwọ nke agha, Edwin Stanton, nwoke Lincoln wepụtara onye kwadoro nnupụisi ndị 'Republican', otu ndị si ná pati gbọwara ndị kwenyere n' ikike dịrị onye ndị Afrika-Amerika nwerela onwe ha, 'congress' gbalịsiri ike ma weta isiokwu iri na otu nke nchụtụ n' ọkwa na-ekwu na Johnson e metọọla ihe a mara dị ka 'Tenure of office act', nke pụtara iwu e mere maka ibelata ikike onyeisi ala nwere iwepu ndị gọọmenti etiti họpụtara n' ụlọ ọrụ n' emeghị ka sineti mara.